二（β－丁氧甲酰乙基）锡二氯化物的合成新工艺

在水体系中用锡粉、丙烯酸丁酯等原料，直接合成二（β－丁氧甲酰乙基）锡二氯化物。对反应温度、溶剂、组分摩尔比、催化剂选择及催化剂用量进行了系统规律性试验。     

甲烷低温催化直接合成乙酸的新途径

对甲烷经合成气路线间接制乙酸的现状及在温和条件下直接转化制乙酸的研究进展作了述评．通过对间接与直接路线的比较．以及在直接路线中,甲烷低温氧化羰化和直接羧化制乙酸均相与非均相催化体系的分析。指出了CH4-CO2低温直接合成乙酸在工艺过程上的显著优势,尤其是采用非均相催化体系．该工艺为乙酸合成和CH4与CO2的绿色化学利用开辟了新途径。其研究将会丰富C1化学化工的理论与实践．并为实现热力学不利反应提供实验方法和理论依据。     

A NEW STRATEGY OF NET DECOMPOSITION IN PROCESS SIMULATION

A new strategy of finding the best set of tear streams is proposed in this paper.It includes lining upall the nodes of the net in the declining order of node weights,and then adjusting the node positions in thesequence such that the total weights of the counter streams minimilcd.The finally formed node sequenceindicates the computation order of the nodes,and the still existing counter streams constitute the tear set.Neither loop identification nor excessive matrix operations are needed in this procedure;therefore,it hasbeen the simplest reliable method of net decomposition to data,and this is demonstrated by seven well-knownexamples.     

SEPARATION OF PALLADIUM(II) FROM PLATINUM(II), IRIDIUM(III), AND RHODIUM(III) USING CENTRIFUGAL PARTITION CHROMATOGRAPHY

The separation of Pd(II) from Pt(II), Ir(III) and Rh(III) with trioctylphosphine oxide (TOPO) in heptane using centrifugal partition chromatography (CPC) has been investigated for the first time. The extraction of Pd(II) has been studied by CPC and batch solvent extraction. The distribution ratios for Pd(II) determined by both methods agree well. In low HCl concentrations (<0.1 M), the extracted species was PdCl₂.(TOPO)₂, irrespective of the chloride concentration, while at acid concentrations above 0.1 M, the Pd was extracted as the ion pair, 2(TOPO.H⁺).PdCl₄ ^2-. Base line separation of Pd(II) and Pt(II) in CPC was obtained under a variety of chloride and HCl concentration with the average number of theoretical plates being 390 ± 40 at a flow rate of 0.47 ± 0.05 mL/min.     

氢氧化镁热分解法制备活性氧化镁(英文)

以氢氧化镁为原料通过热分解法制备了活性氧化镁粉体。利用X射线衍射仪、扫描电镜、压汞仪和热分析仪对粉体进行了表征。结果表明:氢氧化镁通过一步分解生成氧化镁,质量损失率为30.8%,与理论计算质量损失率相吻合。当煅烧温度从400℃增加到600℃,颗粒状氢氧化镁分解生成片状氧化镁。当煅烧温度为550℃,保温10min后,氢氧化镁完全分解,吸碘值达到最大值,为83.6mg/g。     

新法合成1，4－二羟基－2－萘甲酸

新法合成１，４二羟基２萘甲酸，操作简便，溶剂消耗少，反应时间短，收率高。探索了影响反应产率的几种因素。     

新法合成1，4－二羟基－2－萘甲酸

新法合成１，４ 二羟基 ２ 萘甲酸，操作简便，溶剂消耗少，反应时间短，收率高。探索了影响反应产率的几种因素。     

不同间苯含量的共聚酯的合成

研究了 Ti和 Sb催化下不同的间苯含量的共聚酯 (PEIT)的酯化、缩聚反应。结果表明 :随着间苯含量的增加 ,PEIT的酯化反应诱导期缩短 ,酯化温度降低 ,缩聚反应诱导期增长。Ti催化的 PEIT酯化反应速率高于 Sb,而且缩聚反应诱导期比 Sb明显缩短。     

阻燃剂型氢氧化镁生产新工艺研究

介绍了以白云石为原料制备阻燃剂用氢氢氧化镁的试验原理及工艺流程,讨论了试验条件对氢氧化镁性能的影响,与卤水,烧碱法比较,该方法具有原料来源方便,生产成本较低等特点。     

2116#松香改性酚醛树脂生产新工艺

2 1 1 6#松香改性酚醛树脂生产用多聚甲醛替代液体甲醛 ,选取最佳酚醛配比 ,缩合反应加压 ,产品颜色浅 ,质量稳定 ,生产过程污染小 ,为松香改性酚醛树脂的生产和开发拓展了新思路。